There is STILL a queue building as evidenced by an ever increasingly SLOW lag of live vs. processed images. So I added a line of code to evaluate the length of image_q (which was defined as deque with a maxlen of 5 in the video example) The reported value of the deque length remains at one, but the image lag gets longer, and longer, and longer. Something is queing up somewhere. I thought that len(image_q) would show this, but I was wrong. Soliciting suggestions.......